I have a 9000 btu ac in each of my rooms with a 50 pint dehumidifier I run sealed syestem I did have to switch to bottled co2 instead of the generater so that is costing me too I figured the next 2 months it will run me about $450 per room per cycle for co2 and I just got a $1115 sdge bill so in all an extra $750 a month more than normal sucks I use to live by the beach I never even ran an ac all summer